According to the following output, can you tell me which command can redistribute IGRP into
EIGRP?
Router eigrp 123
Network 10.10.10.0
No auto-summary
!
Router igrp 123
Network 172.16.0.0
Network 172.17.0.0

A.
Under the router eigrp mode add redistribute igrp 123 subnets

B.
Under the router igrp mode add redistribute eigrp 123

C.
None, EIGRP and IGRP are automatically redistributed in this instance.

D.
Under the router eigrp mode add redistribute igrp 123

Explanation:
The point of this question is redistribute IGRP into EIGRP.
When redistributing IGRP into EIGRP, there is a feature that they are automatically
redistributed if they have same autonomous system number; in opposite, they need to
manually redistributed if they have different autonomous system number. So option D is
correct.